I recently set up tmux-powerline and noticed that the background color on the status-left, if changed, refuses to go back to default and transparent (if transparency is enabled).

I was able to fix the status-right (because it's before the background is changed), but it seems impossible to clear/erase the background after it's set for a section. I'd love to be wrong about this, though, and was wondering if anyone knows of a solution?

set -g status-left='#[bg=colour89]ANYTHING CAN GO HERE[#bg=default] AND HERE TOO!'

I'd expect to have the background cleared out (bg=default at the beginning would have it stay transparent, and works for status-right), but I get a dark grey instead.